If the titration of 0.8094 g of 100% pure
KHP requires 40.25 mL of NaOH, what
is the concentration of the NaOH
solution? Remember KHP is potassium
hydrogen phthalate, KHC2H4O4. Show
this calculation in your lab notebook.

Answers

Answer 1

Answer:

Explanation:

molecular weight of potassium hydrogen phthalate = 204

.8094 g of KHP = .8094 / 204 = 3.967 x 10⁻³ moles

3.967 x 10⁻³ moles of KHP must have reacted with 3.967 x 10⁻³ moles of NaOH

concentration of NaOH = 3.967 x 10⁻³ / 40.25 x 10⁻³

= .098 M .


Related Questions

The process during which a substance changes from a solid directly to a gas without becoming a liquid is known as: Example(dry ice)

A)
condensation.
B)
fusion.
C)
melting.
D)
sublimation.

Answers

The answer is sublimation

Which phrase is not an example of intercellular communication?

A chemical messengers dock onto receptors of adrenal gland

B chemical signal from pituitary gland to adrenal gland

C electrical signals pass between heart cells

D a vesicle encloses over a nutrient molecule

Answers

Answer: The answer is D

Explanation: I took the quiz just now and got it right

The correct answer is:

D.(a vesicle encloses over a nutrient molecule)

I took the test, hope this helps!


When an atom is trying to obtain stability, what part(s) of the atom change(s)?

Answers

It gains stability by gaining/losing electrons

A solution that holds more solute than it normally can under the conditions at a given temperature is _____. supersaturated unsaturated saturated diluted

Answers

Answer:

Supersaturated !

Explanation:

What is the function of the esophagus?

Answers

The esophagus functions primarily as a transport tube that directs the progression of food and fluids from the mouth to the stomach.

The function of the esophagus is to help with food consumption (correct me if I’m wrong)

illustrate the respiratory system​

Answers

I hope this has the information that you need

How would I create a Lewis dot structure with the compound: CHBr2Cl

Answers

there is a lewis dot calculator on google if that helps

Answer:

Step 1: Find the Total Number of Valence Electrons. ...

Step 2: Find the Number of Electrons Needed to Make the Atoms "Happy" ...

Step 3: Determine the Number of Bonds in the Molecule. ...

Step 4: Choose a Central Atom. ...

Step 5: Draw a Skeletal Structure. ...

Step 6: Place Electrons Around Outside Ato

Explanation:

At what time was the frog sitting still or at rest

Answers

Answer:

What are the times and is that your question?

Explanation:

what is the name of CH3CH2CH2C(O)CH2CH3

Answers

Answer:

1-methoxypropane

Explanation:

Why can stars be called element factories?

Answers

Answer:

They came from the element factories we call stars. Stars are mostly hydrogen throughout most of their lifespans. They are driven by massive and continuous thermonuclear reactions and gravity. ... This extra heat begins to fuse helium atoms into heavier elements like carbon and oxygen and gives new life to the star.

Explanation:

Nearly all elements heavier than hydrogen were not created by the Big Bang. They came from the element factories we call stars. ... This extra heat begins to fuse helium atoms into heavier elements like carbon and oxygen and gives new life to the star. BTW I GOT THIS FROM SAFARI :)

Sanjay is learning about the elements that make up Earth’s crust. Ms. Richards, his Earth science teacher, gives him an element and asks him to determine which element from Earth’s crust it is. She also provides Sanjay with this table. Sanjay weighs the element and finds that it has a mass of 17.98 g. By placing the element in water, he determines the volume of the substance to be 2.2835 mL.

Based on the table from Ms. Richards, what element from Earth’s crust did Ms. Richards gave to Sanjay?
A) iron
B) calcium
C) aluminum
D) silicon

Answers

Answer:

Iron

Hope this helps! Stay safe!

(Plz vote me as brainliest)

Answer:iron

Explanation:

Which element has an outer(ending) electron configuration of s2p4?

Answers

The question is in complete, the complete question is:

Which element has an outer electron configuration of s 2 p4 ?

(A) Ca (B) Cr (C) Ge (D) Se

Answer:

(D) Se

Explanation:

The outer electronic configuration of an atom reflects the group to which it belongs in the periodic table. Each group has its unique outermost electron configuration and number of electrons found in the outermost shell of the atoms of elements in the group.

s 2 p4  is the unique outermost electron configuration of group 16 elements. Group 16 elements have six electrons in their outermost shell. If we consider the options, only Se is a member of group 16. Hence it is only Se that has the outermost electron configuration s 2 p4 .

An element which has an outer (ending) electron configuration of [tex]s^2p^4[/tex] is: Oxygen.

Electron configuration can be defined as a formula that is used to denote the distribution of the atoms of a chemical element in an atomic orbital.

Basically, electron configuration uses four (4) main letters to illustrate the distribution of atoms in an atomic orbital:

spdf

The electron configuration of [tex]s^2p^4[/tex] indicates that the chemical element is in Group 6 and has six (6) electrons in its outermost shell.

Hence, a chemical element such as Oxygen (O) or Selenium (Sn) in Group 6 of the periodic table would have an electron configuration of [tex]s^2p^4[/tex].

Read more: https://brainly.com/question/18214726

What would be the temperature as well as pressure inside and outside of a can if it were to be placed in cold water?

Answers

Answer:

The hot gas molecules are the same pressure as the air outside the can. When the can is placed in cold water upside down, the hot gas water molecules are cooled very rapidly. ... Since the air pressure outside the can is stronger than that inside the can, it causes the can to collapse.

Explanation:

The phase of matter most likely to be present at absolute zero would be:

A)
plasma
B)
gas
C)
liquid
D)
solid

Answers

Answer:

D solid

Explanation:


List the factors that cause low oxygen levels.

Answers

Answer:

Common causes of hypoxemia include:

Anemia.

ARDS (Acute respiratory distress syndrome)

Asthma.

Congenital heart defects in children.

Congenital heart disease in adults.

COPD (chronic obstructive pulmonary disease) exacerbation — worsening of symptoms.

Emphysema.

Interstitial lung disease

and many more.....

What does the name "atom" mean in
Greek?

Answers

It means indivisible

Answer:

The Greek root of atom is atomos, which means "indivisible," since the scientists who first gave the atom its name imagined it couldn't be split or divided into smaller pieces.

Explanation:

In models of molecules, spheres of different colors and
sizes represent different types of atoms.
Which model shows a molecule of a substance that is made up of three
elements?

A
B
C
Or
D ?

Answers

Answer:

D

Explanation:

According to this question, each model of molecules in the options contains spheres of different colors and sizes representing different types of atoms. The atoms of the same element are the spheres of same color and size while atoms of different element are of different color or size.

Therefore, the model showing a molecule of a substance that is made up of three elements is model D because it is made up of three distinct spheres representing atoms of each element.

- The red sphere is the atom of the first element

- The big dark sphere is the atom of the second element

- The small white sphere is the atom of the third element

Answer:

D

Explanation:

Which of the following contribute(s) to most of the mass of an atom?
Question 6 options:

A)

Neutrons only

B)

Protons and neutrons

C)

Protons and electrons

D)

Protons only
Question 7 (5 points)
In a certain chemical reaction, the bonds of the products contain more energy than the bonds of the reactants. For the reaction to occur, which of the following best describes what occurred?
Question 7 options:

A)

Energy was released, so the reaction is endothermic.

B)

Energy was released, so the reaction is exothermic.

C)

Energy was added, so the reaction is endothermic.

D)

Energy was added, so the reaction is exothermic
Question 8 (5 points)
A solution
Question 8 options:

A)

is a single-phase homogeneous mixture.

B)

must contain water.

C)

is always a liquid.

D)

can contain more than two phases.
Question 9 (5 points)
Which of the following is true of alloys?
Question 9 options:

A)

They can only be composed of metals.

B)

They must be held together by chemical bonds.

C)

They're liquid solutions.

D)

They must contain a metal.
Question 10 (5 points)
Which of the following best describes an atomic number? An element's identity is defined by its atomic number; this means it represents the number of
Question 10 options:

A)

electrons in the element.

B)

neutrons in its nucleus.

C)

protons plus neutrons in its nucleus.

D)

protons in its nucleus.

Answers

Answer:

1.

B) protons and newtrons

2.

D)

3.

C)

4.

A)

A sample is left on the desk over several hours. On examination, the crystals appear moist, andliquid is forming around them. The compound is classified as:

a. Stableb.
b. Deliquescent
c. Efflorescentd.
d. Hygroscopic

Answers

Answer:

c. Efflorescent

Explanation:

Some hydrated salts, when exposed to the atmosphere, give off part of all of their water of crystallization spontaneously to form a lower dehydrated or anhydrous salt. Such salts are known as efflorescent and the phenomenon is called Efflorescence.

Efflorescence occurs when the hydrate's aqueous vapor pressure is greater than the water vapor's partial pressure in the air. For example, because the vapor pressures of washing soda (Na2CO3·10H2O) and Glauber's salt (Na2SO4·10H2O) normally exceed that of the water vapor in the atmosphere, these salts effloresce (i.e., lose all or part of their water of hydration), and their surfaces assume a powdery appearance.

if two successive terms of the fibonacci sequence are both odd, is the next term is even or odd? why?​

Answers

Answer:

Even because you always add the previous two terms in the sequence. Since they are both odd, the next term will be even. (odd+odd = even)

Explanation:

Predict: Note the type of reaction you expect for the reactants Kl and Pb(NO3)2

Answers

Answer:

double replacement

Explanation:

just did it

Answer:

Double replacement

Explanation:

what is the hybridization of NO2​

Answers

Answer: Explanation:

If we apply the hybridization rule then it states that if the sum of the number of sigma bonds, lone pair of electrons and odd electrons is equal to three then the hybridization is sp2.

18. Which two particle diagrams each represent a sample of one substance? Key O = atom of oxygen = atom of hydrogen 0 = atom of chlorine 8 OO 1 நம் மும் 20 2000 (1) I and III (3) II and IV (2) II and III (4) I and II​

Answers

Answer:

1 and 11

Explanation:

Answer:1 and 11

Explanation:

Rank lead, phosphorus, and barium in order of increasing ionization energy.
A) Pb < P < Ba
B) Ba < P < Pb
C) Pb < Ba < P
D) Ba < Pb < P

Answers

Answer:

D) Ba < Pb < P

Explanation:

Barium (Ba): 5,2117

Lead (Pb): 7,4167

Phosphorus (P): 10,4867

Increasing order of ionization energy:

Ba < Pb < P

Electronic configurations of given elements

Pb: [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²

P:   [Ne] 3s² 3p³

Ba: [Xe] 6s²

All the given elements have stable half-filled subshells. But phosphorus has the smallest atomic size among them, so it will have the lowest tendency to remove an electron from its valence shell and hence will require the highest amount of ionization energy.  Barium has a higher atomic size than lead, therefore it has lower ionization energy than lead.

How are ionization energy and atomic size related?The force of attraction is stronger when the electron is closer to the nucleus, and as a result, more energy is needed to overcome this attraction and remove the electron.Therefore, the ionization energy increases with decreasing radius and vice versa.

Learn more about trends of ionization energy here:

https://brainly.com/question/6842791

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The purpose for witch something is designed or exists

Answers

Answer:

to help

Explanation:

to help

Which of the following is the BEST description of our atmosphere?

It dissolves meteors and protects us from ultraviolet radiation.

It’s made of a mixture of gases that protect Earth and help create conditions that allow life to live here.

It’s made of nitrogen and oxygen.

It contains a mixture of gases.

Answers

Answer:

I think the answer is B.

Answer:

B

Explanation:

Other things like A, C, and D are not the best explanation because they are all simple senteces.

Question 1 of 10 What is molarity a measurement of? O A. The volume of liquid containing a dissolved substance B. The grams of a substance dissolved in a liquid O c. The concentration of a substance dissolved in a liquid O D. The number of moles of a dissolved substance

Answers

To do this measure called molarity is commonly used. Molarity (M) is defined as the number of moles of solute (n) divided by the volume (V) of the solution in liters. It is important to note that the molarity is defined as moles of solute per liter of solution, not moles of solute per liter of solvent.                    

so the answer is D.

hope this helps have a great day....!

According to the concept of molar concentration, molarity is  defined as the number of moles of a dissolved substance.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Learn more about molar concentration,here:

https://brainly.com/question/21841645

#SPJ5

in addition to Earthquake, hurricane, which of the following could be categorized as a "disaster" risk?

Answers

Answer:

I think its a World War.

Explanation:

This is just what my sister told me, since the cost for the war could make a country poor and the damage it could cause could lead a country to disaster.

i think d answer is tsunami

What are the four main types of tissues in the human body?

epithelial

dermal

vascular

connective

muscle

nervous

Answers

Answer:

epithelium, muscle, connective tissue and nervous tissue.

Explanation:

Explanation:

Epithelial

Connective

Muscle

Nervous

Radio waves are examples of electromagnetic waves. T or F

Answers

Answer:

the answer is true

Explanation:

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